/* Copyright (c) 2021, LiWangQian<liwangqian@huawei.com> All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "libfsm/core/repo.h"

namespace libfsm::core {

result repo::save(entity_ptr obj)
{
    if (obj == nullptr) {
        return -1;
    }

    auto ret = entities_.emplace(obj->id(), obj);
    return ret.second ? 0 : -2; // false->repeat obj
}

repo::entity_ptr repo::remove(repo::entity_id id)
{
    auto iter = entities_.find(id);
    if (iter != entities_.end()) {
        (void)entities_.erase(id);
        return iter->second;
    }

    return nullptr;
}

repo::entity_ptr repo::load(repo::entity_id id)
{
    auto iter = entities_.find(id);
    if (iter != entities_.end()) {
        return iter->second;
    }

    return nullptr;
}

const repo::entity_ptr repo::load(repo::entity_id id) const
{
    auto iter = entities_.find(id);
    if (iter != entities_.end()) {
        return iter->second;
    }

    return nullptr;
}

bool repo::contains(repo::entity_id id) const
{
    return entities_.count(id) != 0;
}

} // namespace libfsm::core
